She points out an about turn (3)
I believe the answer is:
sue
'she' is the definition.
'points out an about turn' is the wordplay.
'points out' becomes 'se' (I am not sure about the 'out' bit.).
'an about' means one lot of letters goes inside another.
'turn' becomes 'u' (a 'U-turn' is a kind of turn).
'se' going around 'u' is 'SUE'.
Can you help me to learn more?
(Other definitions for sue that I've seen before include "Institute legal proceedings (against someone)" , "Susan (dim.)" , "The girl to take to court" , "Proceed legally against (someone)" , "Use to take to court" .)